Question regarding daisy chaining WS2812 5050 leds

Jon Chandler

Joined Jun 12, 2008
1,070
It might sometimes.

It might not sometimes.

A single cap per digit probably isn't enough. The datasheet recommends one per LED, and they wouldn't have made that recommendation if it wasn't needed.
 

joeyd999

Joined Jun 6, 2011
5,356
WS2813B does not require caps.

Pedantic nit: don't connect your SMT pads at angles other than 0, 90, 180, or 270°.

Otherwise, someday this will bite you when your software automatically adds thermals.
 

nsaspook

Joined Aug 27, 2009
13,418
It might sometimes.

It might not sometimes.

A single cap per digit probably isn't enough. The datasheet recommends one per LED, and they wouldn't have made that recommendation if it wasn't needed.
Yes, it depends.

For example
The Chinese 1.3 version of the WS2812B-2020 datasheet says you don't need them. That version seems to have on chip module decoupling. NOTE WS2812B-2020
https://jlcpcb.com/partdetail/Worldsemi-WS2812B2020/C965555

Found a english version.
https://www.tme.com/Document/8b264124130de6e17f8ce807c3210601/WS2812B-2020.pdf
1709760563727.png
 
Last edited:

MisterBill2

Joined Jan 23, 2018
18,934
If what we are shown is the LED side of the PCB and the circuit boards already are made and the pars attached, it can still work to install at least one 0.1 mfd/ 5 volt capacitor between each pair of devices. NOT SMD capacitors but wire lead caps with the leads soldered to the traces. I have done patches like that and they can work well.
 
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